#!/usr/bin/env python
# $FreeBSD$
from hashlib import pbkdf2_hmac
import hashlib
import itertools
import string
#From: https://stackoverflow.com/questions/14945095/how-to-escape-string-for-generated-c
def cstring(s, encoding='ascii'):
if isinstance(s, unicode):
s = s.encode(encoding)
result = ''
for c in s:
if not (32 <= ord(c) < 127) or c in ('\\', '"'):
result += '\\%03o' % ord(c)
else:
result += c
return '"' + result + '"'
intarr = lambda y: ', '.join(map(lambda x: str(ord(x)), y))
_randfd = open('/dev/urandom', 'rb')
_maketrans = string.maketrans('', '')
def randgen(l, delchrs=None):
if delchrs is None:
return _randfd.read(l)
s = ''
while len(s) < l:
s += string.translate(_randfd.read(l - len(s)), _maketrans,
delchrs)
return s
def printhmacres(salt, passwd, itr, hmacout):
print '\t{ %s, %d, %s, %d, %s, %d },' % (cstring(salt), len(salt),
cstring(passwd), itr, cstring(hmacout), len(hmacout))
if __name__ == '__main__':
import sys
if len(sys.argv) == 1:
hashfun = 'sha512'
else:
hashfun = sys.argv[1]
if hashfun not in hashlib.algorithms:
print 'Invalid hash function: %s' % `hashfun`
sys.exit(1)
print '/* Test Vectors for PBKDF2-%s */' % hashfun.upper()
print '\t/* salt, saltlen, passwd, itr, hmacout, hmacoutlen */'
for saltl in xrange(8, 64, 8):
for itr in itertools.chain(xrange(100, 1000, 100), xrange(1000,
10000, 1000)):
for passlen in xrange(8, 80, 8):
salt = randgen(saltl)
passwd = randgen(passlen, '\x00')
hmacout = pbkdf2_hmac(hashfun, passwd, salt,
itr)
printhmacres(salt, passwd, itr, hmacout)
